ALTA/LITTLE COTTONWOOD CANYON HRRR-DERIVED FORECAST GUIDANCE *************************************************************** * THIS IS AN EXPERIMENTAL, AUTOMATED, AND UNOFFICIAL FORECAST * *************************************************************** CREATED/MAINTAINED BY THE STEENBURGH GROUP DEPARTMENT OF ATMOSPHERIC SCIENCES UNIVERSITY OF UTAH Contact: jim.steenburgh@utah.edu WETBULBZERO, 1H QPF, ACCUM QPF DIRECTLY FROM HRRR COLLINS SNOW RATIO/H2O, MT BALDY T/RH, MT BALDY WIND, 1H SNOW, and ACCUM SNOW based on machine learning including UU RF SLR algorithm Based on 12Z 01-Oct-2025 intialized HRRR FORECAST HOURS 0-48 FHR VALID MOUNTAIN TIME COLLINS T MT BALDY T/RH MT BALDY WIND WETBULBZERO SLR/H2O 1H QPF / 1H SNOW / ACCUM QPF / ACCUM SNOW 0 06 AM Wed Oct 01 2025 38F 35F / 81% SW 19 G 33 MPH 10900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 1 07 AM Wed Oct 01 2025 38F 36F / 77% SW 17 G 29 MPH 10900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 2 08 AM Wed Oct 01 2025 38F 35F / 64% SW 18 G 30 MPH 10900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 3 09 AM Wed Oct 01 2025 39F 36F / 60% SW 17 G 29 MPH 10900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 4 10 AM Wed Oct 01 2025 41F 37F / 57% SSW 15 G 27 MPH 10800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 5 11 AM Wed Oct 01 2025 44F 38F / 58% SSW 14 G 26 MPH 10600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 6 12 PM Wed Oct 01 2025 46F 39F / 56% S 14 G 27 MPH 10400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 7 01 PM Wed Oct 01 2025 48F 40F / 55% S 13 G 25 MPH 10600 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 8 02 PM Wed Oct 01 2025 51F 41F / 52% S 11 G 26 MPH 10900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 9 03 PM Wed Oct 01 2025 51F 42F / 49% S 11 G 24 MPH 11100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 10 04 PM Wed Oct 01 2025 50F 43F / 44% S 10 G 24 MPH 11300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 11 05 PM Wed Oct 01 2025 50F 43F / 45% S 12 G 25 MPH 11300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 12 06 PM Wed Oct 01 2025 48F 43F / 45% SSW 12 G 27 MPH 11200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 13 07 PM Wed Oct 01 2025 44F 41F / 45% S 15 G 29 MPH 11100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 14 08 PM Wed Oct 01 2025 42F 40F / 44% S 16 G 31 MPH 10900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 15 09 PM Wed Oct 01 2025 43F 40F / 41% S 19 G 33 MPH 10800 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 16 10 PM Wed Oct 01 2025 43F 41F / 43% S 19 G 35 MPH 11000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 17 11 PM Wed Oct 01 2025 42F 40F / 46% S 17 G 30 MPH 11200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 18 12 AM Thu Oct 02 2025 42F 40F / 48% S 19 G 34 MPH 11300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 19 01 AM Thu Oct 02 2025 42F 40F / 50% S 21 G 37 MPH 11300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 20 02 AM Thu Oct 02 2025 42F 39F / 48% S 21 G 39 MPH 11200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 21 03 AM Thu Oct 02 2025 43F 40F / 47% S 24 G 41 MPH 11000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 22 04 AM Thu Oct 02 2025 43F 40F / 48% S 22 G 41 MPH 11300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 23 05 AM Thu Oct 02 2025 43F 40F / 62% S 26 G 45 MPH 11100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 24 06 AM Thu Oct 02 2025 42F 40F / 65% S 26 G 43 MPH 11100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 25 07 AM Thu Oct 02 2025 42F 40F / 66% SSW 23 G 41 MPH 11100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 26 08 AM Thu Oct 02 2025 42F 40F / 62% SSW 22 G 39 MPH 11200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 27 09 AM Thu Oct 02 2025 44F 41F / 62% SSW 22 G 39 MPH 11200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 28 10 AM Thu Oct 02 2025 46F 41F / 55% S 21 G 39 MPH 11200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 29 11 AM Thu Oct 02 2025 48F 42F / 52% S 17 G 38 MPH 11000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 30 12 PM Thu Oct 02 2025 51F 43F / 51% S 14 G 33 MPH 11100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 31 01 PM Thu Oct 02 2025 53F 44F / 43% S 15 G 33 MPH 11200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 32 02 PM Thu Oct 02 2025 55F 45F / 37% S 14 G 33 MPH 11300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 33 03 PM Thu Oct 02 2025 55F 45F / 34% S 14 G 33 MPH 11400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 34 04 PM Thu Oct 02 2025 54F 46F / 35% S 13 G 31 MPH 11400 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 35 05 PM Thu Oct 02 2025 54F 47F / 34% S 12 G 28 MPH 11500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 36 06 PM Thu Oct 02 2025 52F 46F / 35% S 12 G 28 MPH 11700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 37 07 PM Thu Oct 02 2025 49F 47F / 36% S 14 G 31 MPH 11900 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 38 08 PM Thu Oct 02 2025 47F 45F / 39% SSE 15 G 32 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 39 09 PM Thu Oct 02 2025 46F 44F / 34% S 17 G 32 MPH 11700 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 40 10 PM Thu Oct 02 2025 45F 44F / 41% S 16 G 30 MPH 11500 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 41 11 PM Thu Oct 02 2025 45F 43F / 37% S 17 G 35 MPH 11200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 42 12 AM Fri Oct 03 2025 44F 42F / 35% S 21 G 42 MPH 11300 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 43 01 AM Fri Oct 03 2025 44F 41F / 35% S 22 G 45 MPH 11200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 44 02 AM Fri Oct 03 2025 44F 41F / 43% S 22 G 44 MPH 11000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 45 03 AM Fri Oct 03 2025 44F 41F / 46% S 22 G 46 MPH 11200 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 46 04 AM Fri Oct 03 2025 43F 40F / 54% S 24 G 47 MPH 12100 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 47 05 AM Fri Oct 03 2025 43F 40F / 58% S 23 G 49 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0" 48 06 AM Fri Oct 03 2025 43F 39F / 63% S 24 G 47 MPH 12000 FT 0:1 / -% 0.00" / 0.0" 0.00" / 0.0"